package com.bird.设计原则.单一职责原则.接口层面的单一职责;

/**
 * @data 2022/1/9 10:09
 * @author: bird
 * @description:
 */
public class ICourseImpl implements ICourseContent,ICourseManager {
    @Override
    public String getCourseName() {
        return null;
    }

    @Override
    public byte[] getCourseVideo() {
        return new byte[0];
    }

    @Override
    public void studyCourse() {

    }

    @Override
    public void refundCourse() {

    }
}
